Updated mail address for maintenance team.

src/main/java/org/orekit/rugged/errors/RuggedException.java

@@ -165,7 +165,7 @@ public class RuggedException extends Exception {
         final Localizable specifier = RuggedMessages.INTERNAL_ERROR;
 
         /** Parts to insert in the format (no translation). */
-        final String parts     = "orekit@c-s.fr";
+        final String parts     = "rugged-developers@orekit.org";
 
         return new RuntimeException() {